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//------------------------------------------------------------------------------
// GB_dense_subassign_22: C += b where C is dense and b is a scalar
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// C += b where C is a dense or full matrix and b is a scalar
// C can have any sparsity format, as long as all entries are present;
// GB_is_dense (C)) must hold.
#include "GB_dense.h"
#include "GB_binop.h"
#include "GB_unused.h"
#ifndef GBCUDA_DEV
#include "GB_binop__include.h"
#endif
#define GB_FREE_ALL ;
GrB_Info GB_dense_subassign_22 // C += b where C is dense and b is a scalar
(
GrB_Matrix C, // input/output matrix
const void *scalar, // input scalar
const GrB_Type btype, // type of the input scalar
const GrB_BinaryOp accum, // operator to apply
GB_Context Context
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GrB_Info info ;
ASSERT_MATRIX_OK (C, "C for C+=b", GB0) ;
ASSERT (GB_as_if_full (C)) ;
ASSERT (!GB_PENDING (C)) ;
ASSERT (!GB_JUMBLED (C)) ;
ASSERT (!GB_ZOMBIES (C)) ;
ASSERT (scalar != NULL) ;
ASSERT_TYPE_OK (btype, "btype for C+=b", GB0) ;
ASSERT_BINARYOP_OK (accum, "accum for C+=b", GB0) ;
ASSERT (!GB_OP_IS_POSITIONAL (accum)) ;
GB_ENSURE_FULL (C) ; // convert C to full, if sparsity control allows it
//--------------------------------------------------------------------------
// get the operator
//--------------------------------------------------------------------------
if (accum->opcode == GB_FIRST_binop_code || C->iso)
{
// nothing to do
return (GrB_SUCCESS) ;
}
// C = accum (C,b) will be computed
ASSERT (C->type == accum->ztype) ;
ASSERT (C->type == accum->xtype) ;
ASSERT (GB_Type_compatible (btype, accum->ytype)) ;
//--------------------------------------------------------------------------
// determine the number of threads to use
//--------------------------------------------------------------------------
int64_t cnz = GB_nnz (C) ;
GB_GET_NTHREADS_MAX (nthreads_max, chunk, Context) ;
int nthreads = GB_nthreads (cnz, chunk, nthreads_max) ;
//--------------------------------------------------------------------------
// typecast the scalar into the same type as the y input of the binary op
//--------------------------------------------------------------------------
int64_t csize = C->type->size ;
size_t ysize = accum->ytype->size ;
GB_cast_function
cast_B_to_Y = GB_cast_factory (accum->ytype->code, btype->code) ;
GB_void bwork [GB_VLA(ysize)] ;
cast_B_to_Y (bwork, scalar, btype->size) ;
//--------------------------------------------------------------------------
// C += b, scalar accum into dense, with built-in binary operators
//--------------------------------------------------------------------------
bool done = false ;
#ifndef GBCUDA_DEV
//----------------------------------------------------------------------
// define the worker for the switch factory
//----------------------------------------------------------------------
#define GB_Cdense_accumb(accum,xname) \
GB (_Cdense_accumb_ ## accum ## xname)
#define GB_BINOP_WORKER(accum,xname) \
{ \
info = GB_Cdense_accumb(accum,xname) (C, bwork, nthreads) ; \
done = (info != GrB_NO_VALUE) ; \
} \
break ;
//----------------------------------------------------------------------
// launch the switch factory
//----------------------------------------------------------------------
GB_Opcode opcode ;
GB_Type_code xcode, ycode, zcode ;
if (GB_binop_builtin (C->type, false, btype, false, // C = C + b
accum, false, &opcode, &xcode, &ycode, &zcode))
{
// accumulate sparse matrix into dense matrix with built-in operator
#include "GB_binop_factory.c"
}
#endif
//--------------------------------------------------------------------------
// C += b, scalar accum into dense, with typecasting or user-defined op
//--------------------------------------------------------------------------
if (!done)
{
GB_BURBLE_MATRIX (C, "(generic C(:,:)+=x assign) ") ;
//----------------------------------------------------------------------
// get operators, functions, workspace, contents of b and C
//----------------------------------------------------------------------
GxB_binary_function fadd = accum->binop_function ;
//----------------------------------------------------------------------
// C += b via function pointers, and typecasting
//----------------------------------------------------------------------
// C(i,j) = C(i,j) + scalar
#define GB_BINOP(cout_ij, cin_aij, bwork, i, j) \
fadd (cout_ij, cin_aij, bwork)
// address of Cx [p]
#define GB_CX(p) Cx +((p)*csize)
#define GB_CTYPE GB_void
// no vectorization
#define GB_PRAGMA_SIMD_VECTORIZE ;
#include "GB_dense_subassign_22_template.c"
}
//--------------------------------------------------------------------------
// return result
//--------------------------------------------------------------------------
ASSERT_MATRIX_OK (C, "C+=b output", GB0) ;
return (GrB_SUCCESS) ;
}
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